×
Search for:
Ecovyst
Menu
Investors
HSES
Careers
Newsroom
Investor News
Updates
Our Company
Who We Are
Our People
Our Locations
Ecoservices®
Sulfuric Acid Regeneration
Virgin Sulfuric Acid
Treatment Services
Chem32
Safe Handling Documents/Videos
Advanced Materials & Catalysts
Ecovyst Advanced Silicas
AlphaPol™ Polyolefin Catalysis
AlphaCat® Chemical Catalysis
AlphaSelect® Functionalized Silicas
AlphaBloc™ Anti-Blocking Silicas
Expand
Zeolyst International – Zeolites & Catalysts
Opal Renew™ Renewables
Opal Infinity™ Advanced Recycling
Opal Pure™ Clean Air
Opal Blue™ Clean Water
Expand
Sustainability
Product Innovation
HSES-old
Social Responsibility
Policies
Reporting & Data
Disclosures & Certifications
Contact
Search
Investors
Investors
Overview
News
Press Releases
Events & Presentations
Stock Data
Quote
Charts
Historical Data
SEC Filings
All SEC Filings
Annual Reports & Proxy Statements
Management & Governance
Management Team
Governance at a Glance
Board of Directors
Board Committees
Governance Documents
Resources
Contacts
Email Alerts
All SEC Filings
Filing Type:
View All
10-K
10-Q
11-K
144
3
3/A
4
424B4
424B7
8-A12B
8-K
8-K/A
ARS
CERTNYS
CORRESP
DEF 14A
DEFA14A
EFFECT
FWP
NT 10-K
NT 10-Q
PRE 14A
S-1
S-1/A
S-3ASR
S-8
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SD
UPLOAD
Year:
View All
2025
2024
2023
2022
2021
2020
2019
2018
2017
Date
Form
Description
PDF
XBRL
Pages
03/26/24
4
Statement of changes in beneficial ownership of securities
1
03/22/24
144
Filing for proposed sale of securities under Rule 144
3
03/15/24
PRE 14A
Preliminary proxy statement not related to a contested matter or merger/acquisition
76
03/12/24
4
Statement of changes in beneficial ownership of securities
1
03/08/24
3
Initial statement of beneficial ownership of securities
Documents
expand_more
EX-24.1
6
02/29/24
10-K
Annual report pursuant to Section 13 and 15(d)
Documents
expand_more
EX-21.1
EX-23.1
EX-23.2
EX-31.1
EX-31.2
EX-32.1
EX-32.2
EX-97.1
175
02/28/24
8-K
Current report filing
3
02/28/24
8-K
Current report filing
Documents
expand_more
EX-99.1
20
02/13/24
SC 13G/A
Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions
4
02/13/24
SC 13G
Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions
6
rss_feed
Filing RSS
arrow_back
1
2
3
4
5
6
7
8
9
10
…51
arrow_forward
Email Alerts
RSS News Feed